A phenomenological discussion about ferroelectric phase transition

The irreversibility of ferroelectric phase transition has been studied by u sing irreversible thermodynamics. Heat stagnation of the first-order ferroe lectric phase transition and polydomain configuration of ferroelectrics can be explained on the basis of the principle of minimum entropy production. A conclusion has been derived that the heat stagnation is not an intrinsic property of a system in which a first-order ferroelectric phase transition arises. The finiteness of the system's surface is connected with the heat s tagnation.